Details

• Brand:

  

  

• SKU:

  W500642-S439

• Other Names:

  Automatic Transmission Mount Bolt, Bolt

• Description:

  This is a genuine Ford transmission mount bracket screw, catalogued under base number 500642 with the S439 hex flange head bolt suffix, used to secure the automatic transmission mount bracket on the 2021 through 2025 Ford Bronco with the 2.3L EcoBoost or 2.7L EcoBoost engine. The flanged hex head spreads clamp load across the bracket so the powertrain mount stays seated and the driveline is held in its designed position under torque and road shock. Owners reach for this fastener during a transmission mount or mount bracket replacement, when chasing a driveline clunk on acceleration or shifting, or when reassembling the powertrain after a mount has failed and allowed excess movement. Because the integral washer face is part of the head, it distributes preload evenly and resists loosening in a vibration-prone mounting location. The screw threads into the bracket-to-crossmember interface and should be torqued to the value listed in the Bronco workshop manual for that joint. It is supplied as bare service hardware to original Ford dimensions, so it matches the factory thread, length, and head profile and installs in the original location without modification. Inspect the mating mount insulator and bracket threads while the screw is out, since a degraded rubber mount will quickly work a fresh fastener loose. Clean the threads and verify the joint is fully seated before final torque.

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